window.getSelection（）忽略某些標簽

Question

以下是我的html代碼：

<div id="text">This is <span class="ignore">some</span> short text.</div>

當我使用鼠標並從“是”到“短”中選擇時，使用下面的在線查找功能，

function getSelectionCharOffsetsWithin(element) {
    var start = 0, end = 0;
    var sel, range, priorRange;
    if (typeof window.getSelection != "undefined") {
        range = window.getSelection().getRangeAt(0);
        priorRange = range.cloneRange();
        priorRange.selectNodeContents(element);
        priorRange.setEnd(range.startContainer, range.startOffset);
        start = priorRange.toString().length;
        end = start + range.toString().length;
    } else if (typeof document.selection != "undefined" &&
            (sel = document.selection).type != "Control") {
        range = sel.createRange();
        priorRange = document.body.createTextRange();
        priorRange.moveToElementText(element);
        priorRange.setEndPoint("EndToStart", range);
        start = priorRange.text.length;
        end = start + range.text.length;
    }
    return {
        start: start,
        end: end
    };
}

我將得到Start Range = 5，End Range =20。但是我希望范圍計算忽略<span class="ignore">這樣我就只能得到開始范圍= 5和結束范圍= 14。

我在處理文本之前將文本復制到另一個虛擬div，但似乎window.getSelection（）僅會獲取原始文本，有沒有專家知道如何忽略<span class="ignore">內部的文本，因此我可以獲取准確的范圍？

Answer 1

JSFIDDLE

<div class="content">
Vivamus <span>luctus</span> urna sed urna ultricies ac tempor dui sagittis.
</div>

$(".content").on("mouseup", function () {
    var start = window.getSelection().baseOffset;
    var end = window.getSelection().focusOffset;
    if (start < end) {
        var start = window.getSelection().baseOffset;
        var end = window.getSelection().focusOffset;
    } else {
        var start = window.getSelection().focusOffset;
        var end = window.getSelection().baseOffset;
    }
   alert(window.getSelection());
    alert(start + ", " + end);
});

Answer 2

我已經設計了解決方案，請檢查-http : //jsfiddle.net/ghufranne/awc6c9rp/1/

  function calcTextLength(){
    alert("d");
    var elem = document.getElementsByClassName('p1')[0];
    elem.text='sss';
    alert(elem);
var tex = getSelectedTextWithin(elem);
    elem = document.getElementsByClassName('ignore')[0];

   ignoreText = getSelectedTextWithin(elem);
       alert(tex.length-ignoreText.length);



}


function getSelectedTextWithin(el) {
    var selectedText = "";
    if (typeof window.getSelection != "undefined") {
        var sel = window.getSelection(), rangeCount;
        if ( (rangeCount = sel.rangeCount) > 0 ) {
            var range = document.createRange();
            for (var i = 0, selRange; i < rangeCount; ++i) {
                range.selectNodeContents(el);
                selRange = sel.getRangeAt(i);
                if (selRange.compareBoundaryPoints(range.START_TO_END, range) == 1 && selRange.compareBoundaryPoints(range.END_TO_START, range) == -1) {
                    if (selRange.compareBoundaryPoints(range.START_TO_START, range) == 1) {
                        range.setStart(selRange.startContainer, selRange.startOffset);
                    }
                    if (selRange.compareBoundaryPoints(range.END_TO_END, range) == -1) {
                        range.setEnd(selRange.endContainer, selRange.endOffset);
                    }
                    selectedText += range.toString();
                }
            }
        }
    } else if (typeof document.selection != "undefined" && document.selection.type == "Text") {
        var selTextRange = document.selection.createRange();
        var textRange = selTextRange.duplicate();
        textRange.moveToElementText(el);
        if (selTextRange.compareEndPoints("EndToStart", textRange) == 1 && selTextRange.compareEndPoints("StartToEnd", textRange) == -1) {
            if (selTextRange.compareEndPoints("StartToStart", textRange) == 1) {
                textRange.setEndPoint("StartToStart", selTextRange);
            }
            if (selTextRange.compareEndPoints("EndToEnd", textRange) == -1) {
                textRange.setEndPoint("EndToEnd", selTextRange);
            }
            selectedText = textRange.text.length;
        }
    }

    return selectedText;
}

Answer 3

如果只需要文本（就像我一樣），那么我的簡單解決方案是在獲取文本之前隱藏內部div，然后在顯示之后。 以下是如何開始和結束工作的摘要。 可能是一種更好的方法，但是對我有用。

 function getSelectionCharOffsetsWithin(element) { var start = 0, end = 0; var sel, range, priorRange, text; $('.ignore').hide(); if (typeof window.getSelection != "undefined") { sel = window.getSelection(); text = sel + ''; range = window.getSelection().getRangeAt(0); priorRange = range.cloneRange(); priorRange.selectNodeContents(element); priorRange.setEnd(range.startContainer, range.startOffset); start = priorRange.toString().length; end = start + (sel + '').length; } else if (typeof document.selection != "undefined" && (sel = document.selection).type != "Control") { text = sel + ''; range = sel.createRange(); priorRange = document.body.createTextRange(); priorRange.moveToElementText(element); priorRange.setEndPoint("EndToStart", range); start = priorRange.text.length; end = start + (sel + '').length; } $('.ignore').show(); return { start: start, end: end, text: text }; } function run() { var v = getSelectionCharOffsetsWithin(document.getElementById("text")); document.getElementById("res").innerHTML = "start: " + v.start + " end: " + v.end + " text: " + v.text; } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> <div id="text">This is <span class="ignore">some</span> short text.</div> Select a piece of text above, then click <button onclick="run();">Run</button> <div id="res"></div> 

編輯：jQuery選擇器錯字。